A battery and electronic device

Abstract

The utility model relates to the technical field of battery discloses a kind of battery and electronic equipment, the battery includes battery main body and protection plate, the battery main body includes positive electrode surface and negative electrode surface, the protection plate is set on the positive electrode surface and is respectively electrically connected with the positive electrode surface and the negative electrode surface, positive electrode end and negative electrode end for being connected with external consumer are provided on the protection plate, the protection plate includes control chip and power switch integrated on the control chip and electrically connected with the control chip, the protection plate further includes the insulating plastic package body that the control chip and the power switch are wrapped simultaneously, one end of the power switch is electrically connected with the positive electrode surface, the other end of the power switch is electrically connected with the positive electrode end;The application mainly solves the technical problem of how to reliably protect small battery (for example button cell or small cylindrical battery).

Description

Technical Field

[0001] This utility model relates to the technical field of batteries, and in particular to a battery and electronic device. Background Technology

[0002] With the increasing demand for portable and miniaturized electronic devices, more and more electronic devices (such as wireless Bluetooth headsets) are using button batteries or small cylindrical batteries. Due to the small design of electronic devices, most electronic devices do not currently have a protection circuit for the battery. The battery is only connected to the motherboard of the electronic device by spot welding FPC or nickel sheet. There are certain safety hazards in the transportation and use of the battery. Currently, a small number of electronic devices incorporate battery protection circuits. These protection boards are mostly circular and positioned on the positive terminal of the battery. Because the positive terminal is completely covered by the circular protection board, the battery's heat dissipation capacity is weak. During charging and discharging, heat accumulates on the components of the protection board or at the positive terminal of the battery, reducing battery efficiency and lifespan. In reality, existing protection boards include a control chip and a power switch. The control chip monitors the battery's voltage, current, and temperature in real time. When a short circuit or overheating occurs, the control chip promptly controls the power switch to disconnect, cutting off the circuit between the battery and external appliances, thus protecting the battery. Currently, the control chip is exposed on the circuit board, making it susceptible to damage from external forces. Liquid can easily enter the control chip, causing short circuits and reducing its lifespan. Furthermore, given that the current control chip is designed at the top of the battery's positive terminal, and due to the limited internal space of electronic devices, existing protection boards use a folded plate method to design the power switch used to control the battery's on / off state at the top of the battery's negative terminal and connect it to the negative terminal. In other words, most power switches currently used in narrow spaces are negatively polarized. Compared to the solution where the power switch is connected to the positive terminal, the existing solution where the power switch is connected to the negative terminal has a greater risk of protection failure during use. Therefore, how to design a more reliable protection structure for the battery in a compact space is a technical challenge that urgently needs to be overcome.

[0003] The above information is provided as background information only to aid in understanding this disclosure and does not constitute an assertion or admission that any of the above content can be used as prior art relative to this disclosure. Utility Model Content

[0004] This utility model provides a battery and an electronic device. This application mainly solves the technical problem of how to reliably protect small batteries (such as button batteries or small cylindrical batteries).

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A battery includes a battery body and a protection board. The battery body includes a positive electrode surface and a negative electrode surface. The protection board is disposed on the positive electrode surface and electrically connected to the positive electrode surface and the negative electrode surface, respectively. The protection board is provided with a positive terminal and a negative terminal for connecting to an external electrical appliance. The protection board includes a control chip and a power switch integrated on the control chip and electrically connected to the control chip. One end of the power switch is electrically connected to the positive electrode surface, and the other end of the power switch is electrically connected to the positive terminal.

[0007] In one of the technical solutions, the protection board also includes an insulating plastic encapsulation that simultaneously wraps the control chip and the power switch.

[0008] In one technical solution, the shape of the protective plate is smaller than the shape of the positive electrode surface, so that when the protective plate is mounted on the positive electrode surface, a portion of the positive electrode surface can be exposed.

[0009] In one of the technical solutions, the protective plate includes a first end and a second end arranged opposite to each other, the first end gradually narrowing towards the second end, so that the protective plate has a roughly fan-shaped structure.

[0010] In one of the technical solutions, the control chip is located between the first end and the second end, the positive terminal and the negative terminal are both arranged at the first end of the protection board, the positive electrode surface is electrically connected to the protection board through a first connecting piece, and the first connecting piece is connected to the second end of the protection board.

[0011] In one of the technical solutions, the first connecting piece, the control chip, and the positive terminal are arranged sequentially along a roughly straight line.

[0012] In one of the technical solutions, the negative electrode surface is electrically connected to the protection plate via a second connecting piece, and the second connecting piece is bent and connected to the first end of the protection plate.

[0013] In one of the technical solutions, both the surface of the first connecting piece and the surface of the second connecting piece are provided with a gold plating layer.

[0014] In one of the technical solutions, the battery body is a button cell or a cylindrical cell.

[0015] This application also provides an electronic device, including a device body and a battery as described in any of the above technical solutions, wherein the positive terminal and the negative terminal are respectively electrically connected to the device body.

[0016] Compared with the prior art, the battery provided by this utility model has at least the following beneficial effects:

[0017] This solution integrates the existing power switch onto the control chip, which helps reduce the size of the protection board. This allows for more heat dissipation area for smaller battery units (such as button cells or small cylindrical cells), improving the battery's heat dissipation efficiency and effectively solving the problem of heat accumulation during charging and discharging. This, in turn, enhances the safety of the battery during charging and discharging, enabling its application in scenarios with higher charge / discharge rates. Furthermore, this solution encapsulates the control chip and power switch with an insulating plastic casing, preventing dust or liquid from entering them and extending their lifespan. This solution also places the existing power switch on the positive terminal (i.e., the power switch disconnects the circuit by cutting off the positive terminal between the battery body and the external device body). Compared to solutions where the power switch is placed on the negative terminal, this solution can trigger the protection mechanism of the control chip to disconnect the power switch more quickly when a short circuit occurs in the battery body, thus reliably protecting the battery body from fire and explosion due to short circuit. Furthermore, because this solution integrates the power switch onto the control chip and places it on the positive terminal, the protection board does not need to connect the power switch to the negative terminal surface of the battery body through a folding process. This eliminates the folding process during the manufacturing of the protection board, thereby reducing production costs. This solution is particularly suitable for use with button batteries or small cylindrical batteries, providing reliable protection for them within a compact space. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a battery provided in an embodiment of this application;

[0020] Figure 2 A side view of a battery provided for an embodiment of this application;

[0021] Figure 3 This is a schematic diagram of the internal circuit of the protection board provided in an embodiment of this application;

[0022] Figure 4 The internal circuit diagram of the control chip on the protection board provided in the embodiments of this application is shown.

[0023] Figure label:

[0024] 1. Battery body; 11. Positive electrode surface; 12. Negative electrode surface; 2. Protection board; 21. Control chip; 22. Power switch; 23. Positive terminal; 24. Negative terminal; 25. First end; 26. Second end; 3. First connecting piece; 4. Second connecting piece. Detailed Implementation

[0025] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0026] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0027] It should be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0030] Please refer to the following: Figures 1 to 4This utility model embodiment provides a battery, mainly including a battery body 1 and a protection board 2. The battery body 1 can be a button cell or a small cylindrical battery. The battery body 1 includes a positive electrode surface 11 and a negative electrode surface 12. The positive electrode surface 11 is understood to have a positive electrical charge (represented by B+), and the negative electrode surface 12 is understood to have a negative electrical charge (represented by B-). The protection board 2 is disposed on the positive electrode surface 11 and is electrically connected to both the positive electrode surface 11 and the negative electrode surface 12. The protection board 2 is provided with a positive terminal 23 (represented by P+) and a negative terminal 24 (represented by P-). In use, the external device body needs to be connected to the positive terminal 23 and the negative terminal 24 respectively. In fact, the protection board 2 acts as a bridge between the external device body and the battery body 1. The protection board 2 specifically includes a control chip 21 (…). Figure 3 The protection board 21 (represented by U1) and the power switch 22 are electrically connected to the control chip 21. The control chip 21 has the functions of overcurrent detection, overcharge detection, over-discharge detection and temperature detection. When the protection board 2 detects a circuit abnormality (such as excessive current due to a short circuit, excessive temperature of the battery body 1, etc.), the control chip 21 inside the protection board 2 will control the internal power switch 22 to disconnect, thereby cutting off the circuit between the battery body 1 and the external device body and preventing the battery body 1 from catching fire and exploding.

[0031] Please refer to the following: Figure 3 and Figure 4In this embodiment, the power switch 22 inside the protection board 2 is designed to be integrated with the control chip 21 (represented by U1), and the power switch 22 is designed to be on the positive terminal (i.e., one end of the power switch 22 is electrically connected to the positive terminal surface 11 of the battery body 1, and the other end of the power switch 22 is electrically connected to the positive terminal 23 on the protection board 2). Specifically, this solution integrates the existing power switch 22 onto the control chip 21, which helps to reduce the size of the protection board 2, thereby freeing up more heat dissipation area for the small battery body 1 (such as a button battery or a small cylindrical battery), improving the heat dissipation efficiency of the battery body 1, effectively solving the problem of heat accumulation in the battery body 1 during charging and discharging, and thus improving the safety of the battery body 1 during charging and discharging, enabling the battery body 1 to be used in scenarios with higher charge and discharge rates; secondly, this solution also designs the existing power switch 22 on the positive terminal (i.e., the power switch 22 disconnects the positive terminal B+ of the battery body 1). The circuit between the positive terminal P+ and the external device body is disconnected. Compared to the design where the power switch 22 is designed on the negative terminal, this solution can trigger the protection mechanism of the control chip 21 to disconnect the power switch 22 more quickly when a short circuit occurs in the battery body 1, thus reliably protecting the battery body 1 from fire and explosion due to short circuit. In addition, since this solution integrates the power switch 22 on the control chip 21 and designs it on the positive terminal, the protection board 2 does not need to connect the power switch 22 and the negative terminal surface 12 of the battery body 1 by means of a folding plate. This eliminates the folding plate process during the manufacturing of the protection board 2, thereby reducing the production cost of the protection board 2. This solution is particularly suitable for use in button batteries or small cylindrical batteries, and can provide reliable protection for button batteries or small cylindrical batteries in a compact space.

[0032] Preferably, the protection board 2 in this embodiment also includes an insulating plastic encapsulation that simultaneously wraps the control chip 21 and the power switch 22. This design can prevent dust or liquid from entering the control chip 21 and the power switch 22, thereby helping to extend the service life of the control chip 21 and the power switch 22.

[0033] Please see Figure 1 The shape of the protection plate 2 is smaller than the positive electrode surface 11 of the battery body 1, so that when the protection plate 2 is installed on the positive electrode surface 11, a part of the positive electrode surface 11 can be exposed, thereby giving the positive electrode surface 11 more space for heat dissipation, which in turn helps to improve the heat dissipation efficiency of the battery body 1, making it less likely for heat to accumulate on the positive electrode surface 11 during the charging and discharging process, and effectively reducing the overall temperature rise rate of the battery body 1.

[0034] Please refer to it again. Figure 1The protection plate 2 includes a first end 25 and a second end 26 arranged opposite to each other, with the first end 25 gradually narrowing towards the second end 26, giving the protection plate 2 a roughly fan-shaped structure. The fan-shaped structure of the protection plate 2 eliminates the need for perforations, allowing for a larger heat dissipation area on the positive electrode surface 11 of a prototype button battery or small cylindrical battery. The protection plate 2 without perforations is also easier to manufacture. More specifically, the positive electrode surface 11 is electrically connected to the protection plate 2 via a first connecting piece 3, and the negative electrode surface 12 is electrically connected to the protection plate 2 via a second connecting piece 4. In practice, the second connecting piece 4 needs to be bent to connect to the protection plate 2. Given the fan-shaped structure of the protection plate 2, the first end 25 has a larger area, thus providing more space. Therefore, it is particularly suitable to design the second connecting piece 4 to connect to the first end 25 and to design both the positive terminal 23 and the negative terminal 24 on the first end 25. Furthermore, this design places the control chip 21 between the first end 25 and the second end 26, and the first connecting piece 3 is designed to connect to the second end 26. This design ensures sufficient area for the control chip 21 and sufficient soldering area between the first connecting piece 3 and the protection board 2. It also facilitates the arrangement of the first connecting piece 3, the control chip 21, and the positive terminal 23 in a roughly straight line, minimizing the trace from the positive terminal B+ of the battery body 1 to the output positive terminal 23. This reduces the internal resistance of the protection board 2, thereby reducing the heat generated by the components within the protection board 2 and preventing heat accumulation on the positive electrode surface 11. Preferably, the first connecting piece 3 and the second connecting piece 4 are both nickel sheets with good conductivity. The first connecting piece 3 and the second connecting piece 4 are connected to the battery body 1 and the protection board 2 by soldering. Preferably, both the surfaces of the first connecting piece 3 and the second connecting piece 4 are plated with gold to significantly improve the charge / discharge rate of the battery body 1.

[0035] This application also provides an electronic device, including a device body and the aforementioned battery. The device body can be a wireless Bluetooth headset or an earphone charging case for Bluetooth headsets. The positive terminal 23 and negative terminal 24 of the protection board 2 are connected to the device body, enabling the battery body 1 to provide power to the device body. When the protection board 2 detects a short circuit in the device body or the battery body 1, it promptly disconnects the circuit between the device body and the battery body 1 to prevent the battery body 1 from catching fire or exploding due to prolonged short circuit. This electronic device, using the aforementioned battery, has the advantage of timely circuit disconnection in case of a short circuit, and heat is less likely to accumulate on the battery body 1. Therefore, the electronic device of this solution is safer and more reliable during charging and discharging.

[0036] The above are merely preferred embodiments of the present utility model, and only specifically describe the technical principles of the present utility model. These descriptions are only for explaining the principles of the present utility model and should not be construed as limiting the scope of protection of the present utility model in any way. Based on this explanation, any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model, as well as other specific embodiments of the present utility model that can be conceived by those skilled in the art without creative effort, should be included within the scope of protection of the present utility model.

Claims

1. A battery, characterized in that, The device includes a battery body and a protection board. The battery body includes a positive electrode surface and a negative electrode surface. The protection board is disposed on the positive electrode surface and electrically connected to both the positive electrode surface and the negative electrode surface. The protection board has a positive terminal and a negative terminal for connecting to an external electrical appliance. The protection board includes a control chip and a power switch integrated on the control chip and electrically connected to the control chip. The protection board also includes an insulating plastic encapsulation that simultaneously encapsulates the control chip and the power switch. One end of the power switch is electrically connected to the positive electrode surface, and the other end of the power switch is electrically connected to the positive terminal.

2. The battery as described in claim 1, characterized in that, The protective plate is smaller than the positive electrode surface so that when the protective plate is mounted on the positive electrode surface, a portion of the positive electrode surface is exposed.

3. The battery as described in claim 2, characterized in that, The protective plate includes a first end and a second end arranged opposite to each other, with the first end gradually narrowing towards the second end so that the protective plate has a roughly fan-shaped structure.

4. The battery as described in claim 3, characterized in that, The control chip is located between the first end and the second end. The positive terminal and the negative terminal are both arranged at the first end of the protection board. The positive terminal surface is electrically connected to the protection board through a first connecting piece, and the first connecting piece is connected to the second end of the protection board.

5. The battery as described in claim 4, characterized in that, The first connecting piece, the control chip, and the positive terminal are arranged sequentially along a roughly straight line.

6. The battery as described in claim 4, characterized in that, The negative electrode surface is electrically connected to the protection plate via a second connecting piece, and the second connecting piece is bent and connected to the first end of the protection plate.

7. The battery as described in claim 6, characterized in that, Both the surface of the first connecting piece and the surface of the second connecting piece are provided with a gold plating layer.

8. The battery as claimed in claim 1, characterized in that, The battery body is a button cell or a cylindrical cell.

9. An electronic device, characterized in that, The device includes a main body and a battery as described in any one of claims 1 to 8, wherein the positive terminal and the negative terminal are respectively electrically connected to the main body of the device.

Images